Web change mechanism



March 10, 1936. H. A. w. WOOD WEB CHANGE MECHANISM.

Original Filed Oct. 7, 1930 2 Sheets-Sheet 1 a, AM

March 10, 1936.

H. A. w. woop WEB CHANGE MECHANISM Original Filed Oct. '7, 1930 2Sheets-Sheet 2 p War/243 122 005.

Patented Mar. 10, 1936 PATENT OFFICE WEB CHANGE MECHANISM Henry WiseWood, New York, N. Y., assignor to Wood Newspaper Machinery Corporation,New York, N. Y., a corporation of Virginia Application October 7, 1930,Serial No. 486,930 Renewed June 26, 1934 6 Claims.

, This invention relates to a mechanism for rotating a fresh web roll upto web speed or substantially so preparatory to pasting it'to the webrunning to a printing press.

The principal objects of this invention are to provide means whereby theweb roll can be rotated from its center instead of from itscircumference and means associated therewith for graduating the speed ofrotation of the roll from its axis so that its surface speed shall besubstantially'that of the speed of the web and to provide a graduationscale for gauging the size of the roll on a corresponding scale on thespeed changing mechanism so that the two devices will cooperate and givethe proper speed ratio to compensate for the variations in the diametersof the new rolls.

Other objects and advantages of the inventiorr will appear hereinafter.

Reference is to be had to the accompanying drawings in which Fig. 1 isan end view of a web roll supporting reel and mechanism for gauging thespeed in accordance with this invention, and

Fig. 2 is an elevation of the same partly in section.

This invention relates to that type of web roll changing devices inwhich the fresh roll is brought up to practically the speed of therunning web at the time the web is pressed against the incoming roll andthe forward end of the roll attached to the web. These rolls vary indiameter and it has been customary to rotate them by a moving meanscontacting with the surface of the web roll. In that way the surface ofthe roll can be brought up to web speed without any complicatedmechanism but as the pressure of the driving means is on the surface ofthe roll it causes considerable trouble and sometimes materially injuresthe web.

By this invention the roll is intended to be driven from its axis. Thisdrivingmeans operates from the press but, of course, if all rolls wererotated at the same number of revolutions per minute the surfaces of therolls of different diameters would not rotate at the same linear speed.This invention is designed to provide means for insuring that thesurface speed of the roll shall be correct.

The reel which constitutes the supporting means for the rolls is shownas comprising two spiders Ill mounted on a shaft II which may be rotatedby any desired means through a worm and worm wheel construction l2 as iswell known. In the present instance the spiders are shown as providedwith three arms for supporting three rolls. As is well known also, thereel is rotated around to the proper position so that one of the rolls Ais brought to the position for splicing and that roll now has to bebrought up to web speed at its circumference. Each of the paper rolls Ais supported by chucks l3 at its opposite ends. A drum I4 is secured toone of the chucks'fll3 and is driven by a friction belt IS.

A chain l6 or other flexible connection is driven from some convenientpart of a printing press and through a sprocket l1 drives one member ofa well known cone pulley variable speed. transmission l8. At the otherend of this transmission is a shaft I9 which carries a sprocket 20which, through a chain 2|, drives a sprocket 22 secured to a shaft 23.This shaft is carried in brackets 24 on the frame of the printing press.

The caterpillar arm 25 is pivotally mounted on this shaft 23 to swingthereon and is moved up and down by a link 26, the operation of which isnot shown herein. The caterpillar arm 25 carries a frame 21 at its freeend and on this frame are rotatably mounted three pulleys 28, 29 and 30,which carry the friction belt l5 that rotates the drum l4 and thereforethe roll A.

This friction belt is driven from the shaft 23 by a sprocket 3i thereon,chain 32 and sprocket 33 on the driving pulley 29. Also the shaft ofthis pulley 29 is provided with a sprocket 34 which, by a chain 35,drives a sprocket 36 on the shaft which carries the pulley 28. Thepulley 30 is an idler and the friction belt I5 is driven from the 7other two pulleys on this frame 21.

A dial pointer 38 is connected to the variable speed transmission insuch a manner that a change of the speed ratio by the turning of handwheel 39 causes this point 38 to move across the dial face 4|.

Each reel arm carries a slot 42 which is essentially radial with respectto the roll. Graduations are located along the side of each slot. When anew roll is placed in the reel the operator glances through thecorresponding slot and observes with which graduation the edge of theroll corresponds. Then by turning handwheel 39 so that the pointer 38points to the corresponding number on .the dial face M the variablespeed transmission is automatically set to the proper speed ratio fordriving this particular size roll at the desired speed for splicing.This setting may be made at any time prior to pasting so that when thedriving device is lowered against drum It the incoming roll will bebrought up to the proper speed without further manipulation.

Thus it will be seen that a mechanism is provided for speeding up anincoming roll preparatory to splicing by the application of powerthrough the center of the roll with easy and simple means for adjustingthe speed ratio of the driving mechanism to compensate for differentdiameter rolls.

Although I have illustrated and described only one form of the inventionI am aware of the fact that modifications can be made therein by anyperson skilled in the art without departing from the scope of theinvention as expressed in the claims. Therefore I do not wish to belimited in this respect but what I-do claim is:

1. In a web change mechanism, the combination with means for supportinga fresh web roll, means for rotating the fresh web roll on its own axiscomprising a drum connected with the fresh web roll at its center andmeans for rotating the drum, of means for operating said driving meansincluding a speed ratio changing mechanism, and an adjusting means forthe speed ratio changing mechanism, comprising a scale and pointer,wherebywhen the adjusting means is set to bring the pointer to a certainposition on the scale a fresh web roll of a diameter represented by thatposition on the scale will be rotated at web speed.

2. In a Web change mechanism, the combination of a support for a freshweb roll, a drum rotatable with the fresh web roll, means for rotatingthe drum, a speed ratio changing mechanism through which the drumrotating means is driven, an adjusting device for the speed ratiochanging mechanism, a pointer connected with the adjusting device to beoperated in proportion thereto, a scale over which the pointer passesand means for indicating the diameter of the web roll, the scale andlast named means being calibrated to provide a speed of rotation for thefresh web roll that will give its surface a speed substantially equal tothat of the running web.

3. A web changing mechanism comprising a fresh web roll support, a drumconnected with the fresh web roll at its center, of means for rotatingthe drum at a substantially even speed, and means associated with saidlast mentioned means for graduating the speed of rotation of the rollfrom its axis so that its surface speed shall be substantially that ofthe speed of the web.

4. In a web changing mechanism, the combination with means for drivingthe fresh web roll through the axis thereof, comprising a drum connectedwith the fresh web roll at its center, of a speed ratio changingmechanism connected with said drum and adjustable to compensate for thesize of said fresh roll.

5. In a web change mechanism, the combination of a press driven shaft, aspeed ratio changing mechanism connected thereto, means for rotating afresh roll through its central axis preparatory to splicing, means forconnecting said means to the speed ratio changing mechanism, and meansfor adjusting said speed ratio changing mechanism to compensate for thediameter

